エアロック
No no no no no.
Initially both the US and Russian used pencils, but these weren’t a good solution for writing in space. Why? Because graphite my friends. GRAPHITE. Graphite from pencils flakes off which, on Earth, is no more troublesome that leaving smudges on your hands, desk, and everything else.
In space, with 0 gravity, graphite dust floats around. It floats into control panels and consoles. It lands on microchips and motherboards. It’s not only dirty, it conducts electricity, which can cause electrical and mechanical problems in space.
And finally, NASA did not develop the pen. NASA didn’t even requisition the pen. An independent individual named Paul Fisher developed the pen of his own accord. He then sold pens to NASA for $2.95 a piece.





